Articles go error 500

Now the plugin is deactivated!

The issue i had for months is that everytime i activate the plugin, all my articles get an error 500.

Is known for the plugin to have some troubles to get along with other plugins?
I can give a list of current plugins i use:
AdSense Integration WP QUADS
Seleziona Child Themify
Child Themify
Seleziona Contact Form 7
Contact Form 7
Seleziona DFD Theme Extensions
DFD Theme Extensions
Seleziona Disable plugins / themes updates
Disable plugins / themes updates
Seleziona Duplicate Post
Duplicate Post
Seleziona Google Adsense Dashboard
Google Adsense Dashboard
Seleziona Google Analytics Dashboard per WP (GADWP)
Google Analytics Dashboard per WP (GADWP)
Seleziona Gravity Forms Multilingual
Gravity Forms Multilingual
Seleziona Insert Headers and Footers
Insert Headers and Footers
Seleziona iQ Block Country
iQ Block Country
Seleziona iThemes Security
iThemes Security
Seleziona LayerSlider WP
LayerSlider WP
Seleziona MailChimp per WordPress
MailChimp per WordPress
Seleziona Really Simple CAPTCHA
Really Simple CAPTCHA
Seleziona Revolution Slider
Revolution Slider
Seleziona RSS Autopilot (shared on themelot.net)
RSS Autopilot (shared on themelot.net)
Seleziona Rss Post Importer
Rss Post Importer
Seleziona SMK Sidebar Generator
SMK Sidebar Generator
Seleziona Wordfence Security
Wordfence Security
Seleziona WP Database Backup
WP Database Backup
Seleziona WPBakery Page Builder
WPBakery Page Builder
Seleziona WPML CMS Nav
WPML CMS Nav
Seleziona WPML Compatibility Test Tools
WPML Compatibility Test Tools
Seleziona WPML Media
WPML Media
Seleziona WPML Multilingual CMS
WPML Multilingual CMS
Seleziona WPML Sticky Links
WPML Sticky Links
Seleziona WPML String Translation
WPML String Translation
Seleziona WPML Translation Analytics
WPML Translation Analytics
Seleziona WPML Translation Management
WPML Translation Management
Seleziona WPML XLIFF
WPML XLIFF
Seleziona Yoast SEO
Yoast SEO

The page I need help with: [log in to see the link]